Yards · Tons · 40 lb Bags · Delivered Cost
Topsoil Calculator — How Much Topsoil Do You Need?
Pick a lawn or bed depth from 1/4 inch to 12 inches and get an instant cubic-yard count with tonnage, 40 lb bag equivalents, and a delivered-cost estimate — built for topdressing, overseeding, new sod, and garden beds.
Input Parameters
Area input
✓ 40' 0" (480 in)
✓ 25' 0" (300 in)
Topdressing depth
Topsoil Type & Bags
Premium lawn & bed layer; rocks and clods removed
40 lb equivalents always shown — the standard retail topsoil bag.
Loose topsoil settles 10–15% after rain and raking; 10% is the usual lawn allowance.
Buy Bagged or Bulkoptional
Screened topsoil: typically $20–$40/yd material only.
Unlocks a regional freight range.
Your Topsoil Estimate
Cubic yards to order
6.8
cu yd at 2" · includes +10% allowance
Base volume
6.17 yd³
167 ft³ before allowance
Weight
8.83 t
1.3 t/yd³
40 lb bags
245
0.75 cu ft retail spec
Selected bags
245
40 lb bag (0.75 cu ft)
Cubic feet
183 ft³
167 ft³ base
Area covered
1,000 sq ft
at 2" depth
Planning estimate only — densities are typical delivered moisture, freight is a regional band. Confirm price and depth with your supplier.
Using this topsoil calculator for the finishing layer? For deep grade-up work under the topsoil — 6 to 24 inches of structural fill — use the free dirt calculator on the Dirt Calculator homepage, which handles six shapes, multiple areas, and compaction buffers. Every specialty tool on the site is listed on the Calculators hub.
Topdressing Depth Chart: 1/4 Inch to 12 Inches
Every topsoil order reduces to one multiplication: square feet × depth in inches ÷ 324 gives cubic yards, because one cubic yard covers 324 square feet at a 1-inch depth. The table below applies that formula to the three areas people actually measure — a small 100 sq ft bed, a 500 sq ft side yard, and a 1,000 sq ft lawn — across the full range of topdressing and bed-building depths. The 40 lb bag column uses the standard retail spec of 0.75 cubic feet per bag, so 27 cu ft ÷ 0.75 = 36 bags per cubic yard exactly. Counts assume no allowance; add 10–15% for settling, or use the calculator slider above.
| Depth | 100 sq ft → cu yd | 100 sq ft → 40 lb bags | 500 sq ft → cu yd | 500 sq ft → bags | 1,000 sq ft → cu yd | 1,000 sq ft → bags |
|---|---|---|---|---|---|---|
| 1/4" | 0.08 | 3 | 0.39 | 14 | 0.77 | 28 |
| 1/2" | 0.15 | 6 | 0.77 | 28 | 1.54 | 56 |
| 1" | 0.31 | 12 | 1.54 | 56 | 3.09 | 112 |
| 2" | 0.62 | 23 | 3.09 | 112 | 6.17 | 223 |
| 4" | 1.23 | 45 | 6.17 | 223 | 12.35 | 445 |
| 6" | 1.85 | 67 | 9.26 | 334 | 18.52 | 667 |
| 10" | 3.09 | 112 | 15.43 | 556 | 30.86 | 1,112 |
| 12" | 3.70 | 134 | 18.52 | 667 | 37.04 | 1,334 |
Tip: topdressing stays shallow
Established lawns take 1/4–1/2 inch per pass. Two 1/4-inch applications six weeks apart beat one 1/2-inch burying — grass keeps growing through the thin layer while the level builds.
Warning: the inch you skip
Measuring depth in inches but plugging it into a feet-based formula is the classic error — 6 inches is 0.5 ft. Dividing by 324 already handles that conversion; dividing by 27 without converting inches first inflates the order 12×.
Don't: topdress with fill
Unscreened subsoil or fill dirt spread over grass smothers the crown and imports weed seed and clods. Topdressing layers must be screened, weed-free, and matched to your existing soil texture.
40 lb Bags or a Dump Truck: Where the Breakeven Sits
A 40 lb bag holds 0.75 cubic feet, so a single cubic yard of topsoil equals 36 bags. At $3–6 per bag, bagged topsoil works out to roughly $108–216 per yard against $20–40 per yard for bulk material with freight on top. That gap is why the practical breakeven sits near 1–1.5 cubic yards: below that, one $60–$150 delivery fee dwarfs the material it carries, and bags win on total cost — above it, bulk wins decisively despite the freight.
Cost is not the only axis. Bags go wherever a wheelbarrow goes, which matters for fenced backyards, terraced beds, and any project the truck cannot reach. They also store dry for weeks, so you can topdress in stages rather than pushing a full pile before rain. Bulk's advantages are the mirror image: one delivery, no plastic, and the pile can be amended with compost in the same pass — but it needs driveway access, a tarp, and a weekend of shoveling.
| Order size | 40 lb bags | Bag cost @ $4.50 | Bulk @ $28/yd + $95 freight | Better value |
|---|---|---|---|---|
| 0.5 cu yd | 18 | $81 | ≈ $109 (min. load) | Bags |
| 1 cu yd | 36 | $162 | ≈ $123 | Bulk (close call) |
| 2 cu yd | 72 | $324 | ≈ $151 | Bulk |
| 4 cu yd | 144 | $648 | ≈ $207 | Bulk |
| 6 cu yd | 216 | $972 | ≈ $263 | Bulk |
Scenario table — bag price $4.50, bulk $28/yd screened with a $95 regional delivery fee. Both are typical 2026 planning figures; your supplier's quote decides. Minimum-load clauses can raise small bulk orders to a 2–3 yard bill even when you only need one.
36 bags = 1 yardPhoto: UnsplashPallet math
Topsoil ships 45 × 40 lb bags to a pallet — 33.75 cu ft, or 1.25 cubic yards. Pallet pricing typically undercuts loose bags by 10–20% and a full pallet covers about 200 sq ft at 2 inches.
Topsoil vs. Fill Dirt: Which Layer Gets Which Material
The most expensive mistake in residential earthwork is ordering one material where the project needs two. Fill dirt is subsoil with almost no organic matter — it compacts into a stable base but grows nothing. Topsoil is the living layer, 2–10% organic matter, that plants root into; it also settles and rots if buried deep as structural fill. A proper grade-up uses fill to build height and topsoil as the final 4–6 inch cap, which is exactly how the depth chart above splits its rows.
| Property | Screened topsoil | Unscreened topsoil | Garden / compost mix | Fill dirt (for contrast) |
|---|---|---|---|---|
| Density (t/yd³) | 1.30 | 1.35 | 1.00 | 1.45–1.72 |
| Material price ($/yd) | $20–40 | $10–20 | $25–50 | $5–25 |
| Organic matter | 2–10% | 2–8% | 25%+ | ≈0% |
| Grows plants | Yes | Yes, roughly | Best | No |
| Safe under sod | Yes | With raking | Thin layers only | Never |
| Settles over time | 10–15% | 10–20% | 20–30% | 5–15% (compacts) |
| Right for | Lawn finish, seed beds | Base of deep beds | Amending beds | Grade & backfill |
Densities and price bands mirror the material table in the site engine (topsoil-unscreened 1.35 t/yd³ $10–20 · topsoil-screened 1.30 t/yd³ $20–40 · compost-mix 1.00 t/yd³ $25–50 · fill grades 1.45–1.72 t/yd³) — typical loose delivered values, not laboratory figures.
1/4 inch at a timePhoto: UnsplashLawn soil calculator shortcut
For a pure lawn project, set the depth to 1/4" (leveling), 1/2" (topdressing), or 4" (new seed/sod bed) — those three settings cover most lawn topsoil orders, and the bag column tells you whether a pallet or a truck is the right purchase.
Lawn Topdressing, Overseeding & New Sod Depths
How much topsoil for a lawn at each stage
A lawn consumes topsoil at three very different rates. Leveling dips and hollows takes a 1/4-inch screened layer — 0.77 cubic yards per 1,000 sq ft, about 28 of the 40 lb bags, and the cheapest lawn improvement per dollar there is. General topdressing with compost-blended soil runs a 1/2-inch layer — 1.54 cubic yards per 1,000 sq ft — applied in active growth so grass grows through within two weeks. Starting a new lawn from seed or sod is the big order: 4–6 inches of loose, screened topsoil spread over prepared subgrade, which is 12.3–18.5 cubic yards per 1,000 sq ft before any allowance.
Overseeding: soil contact decides the rate
Overseeding fails more often from lack of seed-to-soil contact than from lack of water. A 1/4-inch screening raked in ahead of seeding covers 200–300 seeds per square inch of contact and costs about one bag of topsoil per 36 sq ft. Going deeper than 1/2 inch over an existing lawn buries blades, yellows the turf, and slows recovery — if the grade needs more than that, core-aerate first and topdress twice rather than one deep application.
Sod bed preparation: depth you can't fake
Sod roots need 4–6 inches of loosened, screened topsoil to knit before summer heat. The finished grade should sit 1 inch below adjacent hardscape so the sod's own thickness lands flush with the patio or walkway. Measure the loose pile, not the plan: 6 inches of finished bed takes closer to 7 inches of loose spread after settling, which is precisely what the calculator's allowance slider adds back.
Quick lawn quantities (per 1,000 sq ft, before allowance)
- 1/4" leveling: 0.77 cu yd · 28 × 40 lb bags
- 1/2" topdressing: 1.54 cu yd · 56 bags
- 2" lawn repair: 6.17 cu yd · 223 bags — switch to bulk here
- 4" new seed bed: 12.35 cu yd — bulk, screened only
- 6" sod bed: 18.52 cu yd — bulk, plus 4–6" of subgrade till
Topsoil Cost & Delivery: Building the Full Budget
A delivered topsoil order has three cost lines: material, freight, and optional spreading labor. Material is the only line suppliers quote first — $20–40 per cubic yard screened, $10–20 unscreened — but freight frequently matches or beats it on small orders, because the truck charges the same $60–$220 regional load fee whether it carries two yards or ten. That is also why ordering a slightly deeper layer rarely changes the total as much as intuition suggests: the material cost scales, the truck fee does not.
Worked example — a 1,000 sq ft lawn topdressing at 1/2 inch with a 10% allowance: base volume is 1.54 cubic yards, order quantity 1.7 cubic yards. Screened topsoil at $28/yd is $47.50 of material; one single-axle load at a typical $95 delivery fee brings the delivered total to about $142. Buying the same volume bagged — 62 forty-pound bags at $4.50 — costs $279 with no delivery fee but a lot of wheelbarrow trips. Both scenarios fit the calculator above; switch the buy-mode toggle to compare them with your own prices.
Material line
$10–40 per cubic yard
Type decides: unscreened $10–20, screened $20–40, garden mix $25–50. Prices are material-only, before freight.
Freight line
$60–220 per load
Regional band from your ZIP. Small orders often carry a minimum-load bill of 2–3 yards even when you take less.
Labor line
$30–60 per hour
DIY spreads ~1 yd³/hour by wheelbarrow. Hired spreading labor typically prices the same range; large lawns justify a loader.
How to read a topsoil quote
- 1. Ask whether the price is per yard or per ton — 1 ton ≈ 0.75 yd of moist topsoil, so a "$20/ton" quote at 1.3 t/yd is ≈$26/yd.
- 2. Ask what "screened" means — mesh size varies from 1/4" to 3/4"; fine screening for lawns costs more than coarse bed screening.
- 3. Ask about the minimum: many yards bill 2–3 yards minimum plus a drop fee under ~$100.
- 4. Ask for compost content if ordering a blend — "garden mix" ranges from 15% to 50% compost between suppliers.
Topsoil Questions, Answered With Numbers
The conversions behind bag counts, tonnage, and depth choices — each answer checkable against the calculator above.
How much topsoil do I need for 1,000 square feet?
How many 40 lb bags of topsoil are on a pallet?
How many yards of topsoil are in a ton?
How many cubic feet are in a yard of topsoil?
How much does 0.75 cubic feet of topsoil weigh?
How much does a yard of topsoil weigh?
How do I calculate how much topsoil I need for a round bed?
Is 1/4 or 1/2 inch of topsoil enough for topdressing a lawn?
Should I order screened or unscreened topsoil?
How much topsoil will I need for overseeding versus new sod?
How much does topsoil cost delivered?
Does topsoil settle after spreading?
Data & sources: densities and material price bands mirror the site calculation engine (screened 1.30 t/yd³ · unscreened 1.35 t/yd³ · garden mix 1.00 t/yd³; $10–50/yd bands). The 40 lb bag = 0.75 cu ft figure follows the standard US retail topsoil bag spec printed by major brands — verify the label on the product you buy. Freight bands come from the site's ZIP-region table. Yardage formulas (÷27, ÷324) are unit conversions, not estimates.
Planning estimates to verify locally: per-bag retail pricing, pallet counts, minimum-load clauses, and regional freight — all vary by supplier and are labeled as typical ranges, not quotes.
Author: Dirt Calculator editorial team · Last updated: October 26, 2026. This page is a planning aid; it does not replace a soil test or your supplier's measured quote.
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